A high Aso anti-o indicates a possible infection with hemolytic streptococci, and possible diseases include active respiratory diseases, suppurative infections of soft tissues and skin, and rheumatic fever. Aso is short for anti-hemolytic streptococci O. Aso anti-o is mainly used to diagnose hemolytic streptococcal infectious diseases. The normal value of anti-o is 0-200IU/ml, if it is beyond this range, it means that anti-o is elevated, which indicates that it may have been infected with hemolytic streptococcus, and its common diseases are as follows: 1. Respiratory diseases: such as Streptococcus pneumoniae pneumonitis, which is an inflammatory lesion of the lung parenchyma caused by Streptococcus pneumoniae. 2. Purulent infections of soft tissues and skin: such as pyoderma of the skin, a skin disease caused by purulent bacterial infection, hemolytic streptococcus is one of its main causative organisms, including folliculitis, dengue, cellulitis, impetigo, etc. 3. Rheumatic fever: related to group A beta hemolytic streptococcal infection. Most patients with rheumatic fever have elevated Aso titers >500 IU/ml. In addition to the above diseases, scarlet fever, rheumatic myocarditis, rheumatoid arthritis, acute glomerulonephritis, pericarditis, etc., can also cause high Aso anti-o. In case of high Aso anti-o, it is recommended to consult a doctor in time to clarify the cause of the disease with the help of a doctor and carry out targeted treatment or therapy.